Prepare to mash the System Update button, A100 owners: the promised update to Android 4.0 (Ice Cream Sandwich, or ICS) has apparently been rolling out since yesterday. Word came to us last night from Canadian reader Graham, who provided a handy-dandy picture as proof:

An XDA thread confirms Graham's update wasn't a fluke, with users all around the world receiving the update. So far the thread is 10 pages long but contains little by way of comments on the user experience after the update, but it does look like the ICS update is preceeded by a smaller 17MB update.

Acer tablet owners across the country were elated (well, most of them were, anyway) when Acer announced that Ice Cream Sandwich will be coming to the A100 and A500 in April. Thanks to a new leak that made its way to XDA, though, the wait for April just got a lot shorter. Ice Cream Sandwich ROMs for both devices landed in their respective forum on XDA earlier today, bringing a taste of Android 4.0 to the duo.

Over the weekend, Acer started pushing the Android 4.0 update to the Iconia Tab A200. Yesterday, Acer ANZ announced that the Ice Cream Sandwich update for the Iconia Tab A500 would be rolling out in April in Australia and New Zealand. Today, in an attempt to roll a turkey, Acer America followed suit and announced the ICS update for not only the A500, but the A100 along with it:

In our first giveaway of the day (there will be another one a bit later, stay tuned), we're handing out the last of our holiday goodies provided by our pals at NVIDIA. Two lucky winners will be selected, one will get the unique ASUS Eee Pad Slider tablet, and another will receive the new Acer Iconia A100. Both winners will also get a Jambox portable speaker and a $25 AMEX gift card.

If you've been holding out on that Acer Iconia A100 purchase for the price to lower a little more, now might be your chance to pick up a pretty sweet deal from Walmart. Effective from Sunday, August 14th through to Saturday, August 20th, you can grab the tablet for just $328 and get a $50 gift card for free while you're at it. For the mathematically lazy, that effectively makes the price just $278.

Update: The 10.1-inch big brother of the A100, the A500, is also available for pre-order and ships on April 20, though it will cost you the substantially larger sum of £449. Why? It's packing an LED-backlit display (as opposed to LCD), 32GB of HDD space, and 1GB of RAM.

This one only applies to our friends across the pond for the moment, but Acer's first attempt at an Android 3.0 tablet has just gone up for pre-order on Amazon UK.